Ipomoea imperati |
Ipomoea macrorhiza |
|
---|---|---|
beach morning-glory |
large-root morning glory |
|
Habit | Perennials. | Perennials, root relatively large, tuberlike. |
Stems | repent, rooting at nodes and underground. |
trailing or twining. |
Leaf | blades lanceolate, linear, oblong, ovate, or 3–5-lobed, 15–80 × 12–60 mm, base cordate to truncate, surfaces glabrous. |
blades ovate, triangular-ovate, or 3-lobed, 50–150 × 50–150 mm, base cordate to sagittate or truncate, margins ± crenulate, surfaces: abaxial tomentulose, adaxial glabrous, minutely beaded along veinlets. |
Peduncles | glabrous. |
tomentulose. |
Flowers | sepals lance-oblong, 10–15 mm, outers shorter than inners, ± coriaceous, apex acute to obtuse, abaxial surface glabrous; corolla white, throat usually yellow, sometimes purplish inside, funnelform, 25–50 mm. |
nocturnal; sepals oblong-elliptic, 16–18 mm, coriaceous, sericeous; corolla white, throat lavender to purple inside, salverform, 50–80 mm. |
2n | = 30. |
|
Ipomoea imperati |
Ipomoea macrorhiza |
|
Phenology | Flowering year-round. | Flowering Jun–Jul. |
Habitat | Beaches, dunes. | Beaches, clearings, dunes. |
Elevation | 0–10 m. (0–0 ft.) | 0–40 m. (0–100 ft.) |
Distribution |
AL; FL; GA; LA; MS; NC; SC; TX; HI; Mexico; Central America; South America; West Indies [Introduced in Europe, Asia, Africa, Australia]
|
AL; FL; GA; MS; NC; SC |
Discussion | Ipomoea imperati was collected once in Pennsylvania (on ballast in 1865). The names I. littoralis (Linnaeus) Boissier 1875, not Blume 1826, and I. stolonifera (Cirillo) J. F. Gmelin are illegitimate; both have been misapplied to plants of I. imperati. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Ipomoea macrorhiza has been confused with the Mexican and Central American I. jalapa (Linnaeus) Pursh; I. macrorhiza differs by having nocturnal, moth-pollinated flowers with white corollas versus matinal, bee-pollinated flowers with lavender corollas. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 14. | FNA vol. 14. |
Parent taxa | Convolvulaceae > Ipomoea | Convolvulaceae > Ipomoea |
Sibling taxa | ||
Synonyms | Convolvulus imperati | |
Name authority | (Vahl) Grisebach: Cat. Pl. Cub., 203. (1866) | Michaux: Fl. Bor.-Amer. 1: 141. (1803) |
Web links |